Guys, how do you "last longer" during sex?

I've done a bit of research, but really have no idea how to fix this issue.

My boyfriend certainly doesn't last a while during sex, and though it's not the biggest deal in the world, it would be nice. So then in that case it IS a deal to me. He comes too early. And it's always always been this way. Now that I'm on the pill, we go without condoms and it's TOO early.
We've talked about it, and though he's not thought of ways (to my knowledge) of how to prolong intercourse, I'd like to already have gathered several options so we can talk about it more than just that we both know he doesn't last long.

What I have read up on this are all things he does naturally. Eats well, exercise, not on medication, is calm... I've tried changing positions in the middle of it, and he was confused. I was like "I was trying to make you last longer!" and he just said "it doesn't help!" and it's funny and I've not been harsh to him about it, but I'd like it to last longer.

Has anyone tried medications? I'm not seeing harmful side effects for the first product that comes up in a link removed search for stamina. I believe it's Stamtrex, or something like that.
I don't want him to have any weird side effects or life threatening consequences... in which case, nevermind it, it's not worth it to me for him to suffer any of that. But I would like to know.

What are some solutions? Medications? More than what I've read which he's doing already?

Its different for every guy but with my experience I find that I HAVE to make a girl cum at least twice before i go. Its a rule that I live by

Some helpful suggestions:

1. Try the "long lasting" condoms. There are condoms out there (forgot exact name/term) that have this special "lubricant" on the inside that kind of numbs the tip of the guys penis and hence makes him last a LONG time.

2. Based on my "rule," If im about to cum i switch positions and during the "switch" my penis gets a "break" and I'm ready to go at it a bit longer.

3. If step 2 doesnt work, I just do the oral thing while I calm down. Sex it up, oral it up, sex it up with a finish.

I certainly wouldn't want him to take forever, and in that way I have tried to think of it as at least he is aroused so much to, but I am more interested in him lasting longer in the penetration in general.

I think all positions are the same for him. But there are 1-2 that are even faster, but kind of all seeming the same.

I don't know about the ring as I thought that was just for more blood flow to make it more stiff which isn't a problem. Unless it stops early ejaculation I'll still check into what it is.